Petroseal C6 3

3% Film-Forming FluoroProtein Foam Concentrate (FFFP)

PetrosealC6 3 is a superior quality Film-Forming FluoroProtein (FFFP) fire fighting foam concentrate for extinguishing and securing flammable hydrocarbon liquid fires.

Its unique formulation is based on advanced protein foam technology. The protein base material provides a tough cohesive foam blanket with high resistance to heat that provides the same post-fire security as a top quality FluoroProtein (FP). Fluorochemical surface active agents combined with the protein base produce a vapour sealing aqueous film that provides the same fast control and extinguishment as a top quality synthetic AFFF.

  • Highly versatile and so eliminates the need to stock a variety of foam types.
  • Film-forming for fast flame knock down and extinguishment.
  • Stable and long-lasting foam blanket for excellent burnback resistance and post-fire security.
  • Detergent-free for high resistance to fuel pick-up.
  • Foam blanket re-seals when ruptured by personnel or equipment.
  • Reduced stocks, low cost storage, long shelf-life, and low usage levels combine to provide maximum cost effectiveness.
  •  Suitable for use with fresh or sea water

Performance Approvals    

  • PetrosealC6 3 is independently tested and certified to EN1568:2008 Part 3.
  • Tested to ICAO Level B performance.
  • Audited and approved to Underwriters Laboratories UL162 (7th Edition).


PetrosealC6 3 is the ideal fire fighting foam to use in high risk situations where hydrocarbons (such as aviation kerosene, crude oil, gasoline, and diesel fuel) are stored, processed, or transported. It is used extensively on Rapid Intervention Vehicles at major international airports and military bases where fast extinguishment and postfire security with limited quantities of foam concentrate are essential.


PetrosealC6 3 is intended for use at 3% (3 parts concentrate to 97 parts water). Petroseal C6 3 is readily proportioned using conventional foam proportioning equipment.

PetrosealC6 3 can be used with air aspirating discharge devices such as low expansion branchpipes, monitors, top pourer sets and foam/water sprinklers where a stable foam over is essential as well as through Mex devices.

As with any foam, PetrosealC6 3 is best applied gently on to the burning liquid surface. However, the exceptional resistance to fuel contamination of FFFP enables it to direct application.

PetrosealC6 3 can be used with non-aspirating discharge devices such as spray/fog branchpipes and nozzles, monitors, and spray/fog sprinklers for fast fire knockdown.

Physical Properties 


Dark brown liquid

Specific gravity @ 20°C

1.11 - 1.15

pH @ 20°C

6.6 - 7.6

Viscosity @ 20°C (mm2 sec-1)

5.0 - 9.0

Max. continuous storage temp. (°C)


Max. continuous storage temp. (°C)


UL lowest use temp. (°C)


Freezing point (°C)


Freeze / thaw effect

Product is not damaged by freezing.
After thawing agitate gently.

Expansion ratio *

≥ 7:1

25% drainage time * 

≥ 2 mins

* Foam generated using the U.K. Defence Standard DEF42-40 5 lpm branchpipe at 7 Bar pressure. Foam collected in a 1630 ml N.F.P.A. drainage pan.


PetrosealC6 3 is suitable for use in combination with:

  • Soft or hard, fresh, brackish or sea water.
  • Dry powder extinguishing agents either separately or as twin agent systems.
  • Expanded protein-based or synthetic foams for application to a fire in sequence or simultaneously.


PetrosealC6 3 is exceptionally stable in long-term storage. A shelf-life of at least ten years can be expected if it is stored properly.


PetrosealC6 3 is produced to rigorous quality control standards to ensure consistent fire performance and excellent product reliability.

Angus Fire operates a quality management system which complies with the requirements of BS EN ISO 9001.

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UL listed UL 162 EN1568 ICAO LevelB EPA 2015 compliant